I have just begun to encounter a problem in as much that if I try to send an
email to an address not in my address book Outlook stops it being sent unless
I create a new contact. This has never happened before and surely can not be
right - I do not want to create a contact for everyone I send an email to!

Any advice appreciated (I use Windows XP Home and have McAfee Security Suite
- I mention McAfee as it appears to create problems!)

Thanks